UV-induced dissociation of CH2BrI probed by intense femtosecond XUV pulses

UV-induced dissociation of CH2BrI probed by intense femtosecond XUV pulses
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通过强飞秒 XUV 脉冲探测 CH2BrI 的 UV 诱导解离

DOI:
10.1088/1361-6455/ac489d
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发表时间:
2022
期刊:
Journal of Physics B: Atomic, Molecular and Optical Physics
影响因子:
--
通讯作者:
R. Boll
R. Boll
中科院分区:
--
文献类型:
--
作者:
H. Köckert;Jason W. L. Lee;F. Allum;K. Amini;S. Bari;C. Bomme;F. Brausse;M. Brouard;M. Burt;B. K. Cunha de Miranda;S. Duesterer;P. Eng;B. Erk;M. Géléoc;R. Géneaux;A. Gentleman;R. Guillemin;G. Goldsztejn;D. Holland;I. Ismail;L. Journel;T. Kierspel;J. Küpper;J. Lahl;S. Mackenzie;S. Maclot;B. Manschwetus;A. Mereshchenko;T. Mullins;P. Olshin;J. Palaudoux;F. Penent;M. Piancastelli;D. Rompotis;A. Rouzée;T. Ruchon;A. Rudenko;N. Schirmel;M. Simon;S. Techert;O. Travnikova;S. Trippel;C. Vallance;Enliang Wang;J. Wiese;F. Ziaee;T. Marchenko;D. Rolles;R. Boll

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The ultraviolet (UV)-induced dissociation and photofragmentation of gas-phase CH2BrI molecules induced by intense femtosecond extreme ultraviolet (XUV) pulses at three different photon energies are studied by multi-mass ion imaging. Using a UV-pump–XUV-probe scheme, charge transfer between highly charged iodine ions and neutral CH2Br radicals produced by C–I bond cleavage is investigated. In earlier charge-transfer studies, the center of mass of the molecules was located along the axis of the bond cleaved by the pump pulse. In the present case of CH2BrI, this is not the case, thus inducing a rotation of the fragment. We discuss the influence of the rotation on the charge transfer process using a classical over-the-barrier model. Our modeling suggests that, despite the fact that the dissociation is slower due to the rotational excitation, the critical interatomic distance for charge transfer is reached faster. Furthermore, we suggest that charge transfer during molecular fragmentation may be modulated in a complex way.
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